It's the fourth day of our Seven Days of Christmas deals, and according to the RAC motorists are going to see rising fuel prices of up to 12p per litre before Christmas.

The hike is due to the rising price of crude oil, and could land motorists with an extra £150 on top of their fuel expenditure next year.

Luckily, there is a way to beat the hike. There is a way to get £15 off your next fuel stop at petrol stations across the UK.

How to get the offer

With the news that petrol prices may be on the rise again, TopCashback , the money saving website, is offering new members £15 cashback on a £15+ spend at petrol stations across the UK including Tesco, Morrisons, Sainsbury’s, BP and Shell.

This offer is only valid for in-store purchases not online. The date shown on your snapped receipt must be within the offer period above. After you’ve submitted your receipt, your cashback may take up to seven days to show in your TopCashback account.

Or you can follow these tips to save even more money on your fuel bill.

Less is more (money).

When you drive a car that has been parked for a few hours, it uses much more fuel for the first five miles or so. Try to make fewer trips, combining daily errands into one journey.

Timing is everything.

Every time that you stop and start in traffic, your car needs a huge amount of fuel to get moving again. The best solution is to avoid the jams … time trips to avoid the rush hour.

Shut it!

When you are moving quickly, the shape of your car is very important - the sleeker the better to cut drag (wind resistance), saving power and fuel. So help smooth that shape by shutting windows and sunroof.

What a drag

Even if a roof rack is empty, it increases drag, while the wind-resistance of a roof box takes an even greater toll on fuel. Stow them away when you're not using them.

Keep it light

The more weight your car carries, the more fuel it needs to move along. So, don't cart stuff around in the boot unless you need it.

Easy does it

The fuel-conscious way to drive is at a constant speed (ideally 50mph), and in the highest gear. So if you are a patient driver, you'll become a stranger to the filling station.

Footwork

Resist the temptation to be heavy-footed. You may be in a high gear and driving at a sensible speed, but if you push the accelerator down a long way to avoid changing into a lower gear (to third from fourth, say), then you use more fuel.

Air we go

Air-conditioning is a great feature but the pump that operates it makes a demand on fuel, so switch off air con when the weather’s not hot.

It’s the limit

If you ignored the law (not something we advocate) you might cut the duration of a motorway trip by driving at 80mph instead of 70mph. But, while saving time, the increased demand on the engine makes for a heavy cost in fuel.

Under pressure

Take five minutes every fortnight to check the pressure of your car’s tyres. Under-inflation means the engine has to work harder to turn the wheels, using more fuel.

The small print

The £15 cashback on £15+ spend fuel deal is only available for new members with no previous purchases or cashback through TopCashback